Skip to main content

Table 2 Geometrical details of the reactors used, geometrical details of impeller configurations and ranges of turbulence parameters

From: Characterization of hydromechanical stress in aerated stirred tanks up to 40 m3 scale by measurement of maximum stable drop size

Geometrical details of reactors Geometrical details of impellers Turbulence parameters
Reactor configuration Nominal reactor size DR VL H Number of impellers C ΔC d h w d/DR h/d w/d Po n Re λ λ/Λ dmax Λ/dmax
   m       m m m - - - - 1/s - μm - - -
A-1 50 L 0.293 0.035 0.52 3 0.095 0.19 0.104 0.023 0.029 0.35 0.22 0.28 5.5 4.0 – 11.7 4.3 – 12∙104 16 – 32 286 – 571 14 – 28 11 – 39
A-2 0.15 0.05 0.05 0.51 0.33 0.33 8 3.6 – 8.0 8.1 – 18∙104 13 – 23 400 – 688 17 – 21 19 – 40
A-3 0.17 0.05 0.05 0.58 0.29 0.29 7.1 3.3 – 7.2 9.6 – 21∙104 14 – 23 402 – 674 17 – 21 19 – 39
A-4 0.19 0.05 0.05 0.65 0.26 0.26 6.4 2.8 – 6.1 1.0 – 2.2∙105 13 – 23 396 – 695 17 – 21 19 – 42
B-1 3 m3 1.2 2.4a 2.2 3 0.51 0.69 0.41 0.09 0.12 0.34 0.22 0.28 4.9 2.1 - 5.8 2.5 – 9.7∙105 11 – 23 1.5 – 3.2∙103 14 – 23 71 – 211
B-2 0.45 0.09 0.12 0.38 0.2 0.26 5 1.9 – 5.1 3.7 – 10∙105 11 – 23 1.5 – 3.2∙103 15 – 26 64 – 185
B-3 0.51 0.12 0.18 0.43 0.24 0.34 5.9 1.3 – 4.2 2.6 – 11∙105 11 – 25 1.9 – 4.4∙103 15 – 24 82 – 261
C-1 40 m3 2.8 30 5 3 0.92 1.8 1.19 0.22 0.29 0.42 0.19 0.24 4.7 0.8 – 2.3 1.1 – 3.3∙106 11 – 22 3.9 – 8.3∙103 13 – 24 163 – 652
  1. All impellers were 6-bladed Rushton type impellers installed in a three impeller configuration. Power numbers were estimated with Eq. 10, except for setup B-1 and B-3 for which Power numbers could be measured.
  2. afor 0.1 vvm aeration rate: 2.6 m3, see Daub et al. [24].